From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EB0062505AA for ; Fri, 13 Feb 2026 17:50:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.12 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771005048; cv=none; b=Iupympv1i9265gthCdJgigroTrQ/afTeqkOZu1zfXjxDcUPurMNigUJucOiNBJkW1If/IOI9QXEzbdbuZMdiTv5f9Bx10Mxlj/aG959WekUF0MYa047jDBLdp75fITJL9xq77fcl1b80nb3ORXMbtJURpXn8/CykrBrqjOYo3UQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771005048; c=relaxed/simple; bh=Hn/YbMCFPNwy7WqclUnTHTDS9PREVwpYJ6OC8kfWHYQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=jvXK9DDR6H64vj7J9uQapiO+0z7cELMg0pZhVmx8j0JPE1A+kRg//rZrehe8243moup1ycsbvMKimC+UONdsSHKLRlvWhMt8qpJq0qeWP5p/06hH6ZqaTUxi6N3kOeJ2qSe7re6UxXDcmxAwExWkwqXJIHTeY7O3BQSgT5AArds= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=lAaxG2qN; arc=none smtp.client-ip=192.198.163.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="lAaxG2qN" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1771005047; x=1802541047; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=Hn/YbMCFPNwy7WqclUnTHTDS9PREVwpYJ6OC8kfWHYQ=; b=lAaxG2qNH4ZlQSogjeXake+jOm5hDzzCm/aBXaiubv6FjmkIshyW69a2 B9JUvwb9zEufM83GEzytGhw/Zzf8TS846J1QssbiTomyZ82HX5l7kx/L7 O0PW9AB13ZWMZdqpHtlPovHQ7qiATMdYXIjQXPU6q4AaAnUOyKc3Xr7hD +ydrVWl9T3Lfp9zVu2RT8sJpvIMXlVQLRxaL/grtVpw3mJkmkmV2jsRL0 bivlc0MqzcWnz6Z8Fgo/iqCLfqrAeQl/gAzV3cxIoYG+HArTLKJ27lOEl rMUOxpcRpQDPRtmWTh9cdoQxNHLIBJl/OyPUN3+2TXvP3kuN0FEltADLF Q==; X-CSE-ConnectionGUID: 9b0ibA3bSEC666gYxwgkBg== X-CSE-MsgGUID: lQc0CsQwSn65otBFkK6TvA== X-IronPort-AV: E=McAfee;i="6800,10657,11700"; a="76042147" X-IronPort-AV: E=Sophos;i="6.21,289,1763452800"; d="scan'208";a="76042147" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Feb 2026 09:50:46 -0800 X-CSE-ConnectionGUID: HsqJDspKS4WjuQjo+NXLxQ== X-CSE-MsgGUID: bqD5zFG7TJa7NeOs2yrG/Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,289,1763452800"; d="scan'208";a="212227967" Received: from lkp-server01.sh.intel.com (HELO 765f4a05e27f) ([10.239.97.150]) by orviesa010.jf.intel.com with ESMTP; 13 Feb 2026 09:50:40 -0800 Received: from kbuild by 765f4a05e27f with local (Exim 4.98.2) (envelope-from ) id 1vqxJN-00000000viu-43MR; Fri, 13 Feb 2026 17:50:38 +0000 Date: Sat, 14 Feb 2026 01:50:20 +0800 From: kernel test robot To: LiuQingtao , gregkh@linuxfoundation.org Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, jirislaby@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, neil.armstrong@linaro.org, bjorn.andersson@oss.qualcomm.com, marex@nabladev.com, dev@kael-k.io, mani@kernel.org, prabhakar.mahadev-lad.rj@bp.renesas.com, linux-serial@vger.kernel.org, linux-riscv@lists.infradead.org, liu.wenhong35@zte.com.cn, liu.qingtao2@zte.com.cn, hu.yuye@zte.com.cn, dai.hualiang@zte.com.cn, deng.weixian@zte.com.cn, jia.yunxiang@zte.com.cn, bai.lu5@zte.com.cn, yang.susheng@zte.com.cn, shen.lin1@zte.com.cn, tan.hu@zte.com.cn, zuo.jiang@zte.com.cn Subject: Re: [PATCH v1 2/2] LRW UART: serial: add driver for the LRW UART Message-ID: <202602140108.kLMOYbwS-lkp@intel.com> References: <20260213093334.9217-3-qtliu@mail.ustc.edu.cn> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260213093334.9217-3-qtliu@mail.ustc.edu.cn> Hi LiuQingtao, kernel test robot noticed the following build warnings: [auto build test WARNING on tty/tty-testing] [also build test WARNING on tty/tty-next tty/tty-linus robh/for-next usb/usb-testing usb/usb-next usb/usb-linus linus/master v6.19 next-20260212] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/LiuQingtao/LRW-UART-dt-bindings-Add-binding-for-LRW-UART/20260213-173610 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing patch link: https://lore.kernel.org/r/20260213093334.9217-3-qtliu%40mail.ustc.edu.cn patch subject: [PATCH v1 2/2] LRW UART: serial: add driver for the LRW UART config: riscv-allyesconfig (https://download.01.org/0day-ci/archive/20260214/202602140108.kLMOYbwS-lkp@intel.com/config) compiler: clang version 16.0.6 (https://github.com/llvm/llvm-project 7cbf1a2591520c2491aa35339f227775f4d3adf6) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260214/202602140108.kLMOYbwS-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202602140108.kLMOYbwS-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/tty/serial/lrw_uart.c:2266:3: warning: variable 'new_mcfg' is uninitialized when used here [-Wuninitialized] new_mcfg |= UARTMCFG_UARTEN | UARTMCFG_TXE; ^~~~~~~~ drivers/tty/serial/lrw_uart.c:2246:37: note: initialize the variable 'new_mcfg' to silence this warning unsigned int old_mcfg = 0, new_mcfg; ^ = 0 1 warning generated. vim +/new_mcfg +2266 drivers/tty/serial/lrw_uart.c 2240 2241 static void 2242 lrw_uart_console_write(struct console *co, const char *s, unsigned int count) 2243 { 2244 struct lrw_uart_port *sup = lrw_uart_console_ports[co->index]; 2245 unsigned int old_fccr = 0, new_fccr; 2246 unsigned int old_mcfg = 0, new_mcfg; 2247 unsigned long flags; 2248 int locked = 1; 2249 2250 clk_enable(sup->clk); 2251 2252 if (oops_in_progress) 2253 locked = uart_port_trylock_irqsave(&sup->port, &flags); 2254 else 2255 uart_port_lock_irqsave(&sup->port, &flags); 2256 2257 /* 2258 * First save the FCCR then disable the interrupts 2259 */ 2260 if (!sup->vendor->always_enabled) { 2261 old_fccr = lrw_uart_read(sup, REG_FCCR); 2262 new_fccr = old_fccr & ~UARTFCCR_CTSEN; 2263 lrw_uart_write(new_fccr, sup, REG_FCCR); 2264 2265 old_mcfg = lrw_uart_read(sup, REG_MCFG); > 2266 new_mcfg |= UARTMCFG_UARTEN | UARTMCFG_TXE; 2267 lrw_uart_write(new_mcfg, sup, REG_MCFG); 2268 } 2269 2270 uart_console_write(&sup->port, s, count, lrw_uart_console_putchar); 2271 2272 /* 2273 * Finally, wait for transmitter to become empty and restore the 2274 * TCR. Allow feature register bits to be inverted to work around 2275 * errata. 2276 */ 2277 while ((lrw_uart_read(sup, REG_FR) ^ sup->vendor->inv_fr) 2278 & sup->vendor->fr_busy) 2279 cpu_relax(); 2280 if (!sup->vendor->always_enabled) { 2281 lrw_uart_write(old_fccr, sup, REG_FCCR); 2282 lrw_uart_write(old_mcfg, sup, REG_MCFG); 2283 } 2284 2285 if (locked) 2286 uart_port_unlock_irqrestore(&sup->port, flags); 2287 2288 clk_disable(sup->clk); 2289 } 2290 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki